CN116090301A

CN116090301A - Rigidity performance analysis method and device for vehicle-mounted display screen

Info

Publication number: CN116090301A
Application number: CN202310079472.XA
Authority: CN
Inventors: 王尚英
Original assignee: Avatr Technology Chongqing Co Ltd
Current assignee: Avatr Technology Chongqing Co Ltd
Priority date: 2023-01-28
Filing date: 2023-01-28
Publication date: 2023-05-09

Abstract

The embodiment of the invention relates to the technical field of automobiles, and discloses a method and a device for analyzing rigidity performance of a vehicle-mounted display screen, wherein the method comprises the following steps: and establishing a finite element model of the target object, analyzing the finite element model of the target object to obtain the performance parameters of the display screen assembly, and determining the analysis result of the display screen assembly. By applying the technical scheme of the embodiment of the application, the analysis result of the rigidity performance of the display screen assembly can be verified in the design stage of the display screen assembly, the waste of research and development time and cost caused by the fact that a plurality of samples are required to be produced in a traditional mode is avoided, the research and development efficiency of the display screen assembly is improved, and the research and development cost is reduced.

Description

Rigidity performance analysis method and device for vehicle-mounted display screen

Technical Field

The embodiment of the invention relates to the technical field of automobiles, in particular to a method and a device for analyzing rigidity performance of a vehicle-mounted display screen.

Background

An instrument panel (instrument panel) is an assembly in which various indicators, ignition switches, and the like are installed in a cab. In order to display the indication instrument, a display screen is required to be arranged on the instrument board, and the display screen is required to have certain rigidity performance on the premise of meeting the display function.

The existing method for testing the rigidity performance of the display screen on the instrument panel is to assemble the instrument panel and the display screen according to the design state for producing the display screen sample, then use special experimental equipment to complete the rigidity performance test of the display screen, and manually judge whether the display screen meets the design standard or whether the display screen fails under certain test conditions.

The test result obtained by the test method is easily influenced by a tester, test equipment, a test environment and the test method, so that the problem of low accuracy of the test result is caused, or the problem of different test evaluation standards is generated.

Disclosure of Invention

In view of the above problems, the embodiments of the present invention provide a method and an apparatus for analyzing rigidity performance of a vehicle-mounted display screen, which are used for solving the problems in the prior art that a sample of a display screen assembly needs to be produced, and the rigidity performance of the display screen assembly is verified, so that research and development time and cost are wasted.

According to an aspect of the embodiment of the invention, there is provided a method for analyzing rigidity performance of a vehicle-mounted display screen, including:

establishing a finite element model of a target object, wherein the target object comprises a display screen assembly;

analyzing the finite element model of the target object to obtain performance parameters of the display screen assembly, wherein the performance parameters of the display screen assembly comprise at least one of maximum displacement, residual displacement and maximum plastic strain of the display screen assembly;

and determining an analysis result of the display screen assembly according to the performance parameters of the display screen assembly.

In an alternative manner, the analyzing the finite element model of the target object to obtain the performance parameter of the display screen assembly includes:

obtaining constraint conditions of the finite element model of the target object and load conditions of the display screen assembly;

and analyzing the finite element model of the target object according to the constraint condition of the finite element model of the target object and the load condition of the display screen assembly to obtain the performance parameters of the display screen assembly.

In an alternative way, the constraint includes: a first constraint and a second constraint;

The first constraint includes: the degree of freedom of the joint of the two parts in the target object;

the second constraint includes: and the deformation degree of freedom of the display screen assembly.

In an alternative form, the finite element model of the target object comprises grid nodes;

the finite element model of the target object is analyzed according to the constraint condition of the finite element model of the target object and the load condition of the display screen assembly to obtain the performance parameters of the display screen assembly, and the method comprises the following steps:

defining the degree of freedom of a joint between the finite element models of two parts in the finite element model of the target object according to the first constraint condition;

according to the second constraint condition, defining the degree of freedom of grid nodes of a display screen assembly included in the finite element model of the target object;

defining a test load of a display screen assembly in a finite element model of the target object according to the load condition;

and analyzing the finite element model of the defined target object to obtain the performance parameters of the display screen assembly.

In an alternative manner, the building a finite element model of the target object includes:

Acquiring physical parameters of a three-dimensional model of the target object;

performing grid division on the three-dimensional model of the target object;

and giving the physical parameters to the three-dimensional model of the target object to obtain the finite element model of the target object.

In an alternative, the physical parameter includes: size information and/or material parameters.

In an alternative mode, the display assembly comprises a display body, a display backboard and a display base;

the step of meshing the three-dimensional model of the target object specifically comprises the following steps:

uniformly dividing a three-dimensional model of the vehicle instrument panel assembly by adopting a neutral plane grid;

dividing a three-dimensional model of the display screen body, a three-dimensional model of the display screen backboard and a three-dimensional model of the display screen bottom plate by adopting neutral plane grids, and dividing a three-dimensional model of the display screen base by adopting tetrahedral grids;

and uniformly and excessively adopting local refined grids at a first position of the three-dimensional model of the display screen assembly, wherein the first position is a position used for connection on the three-dimensional model of the display screen assembly.

In an optional manner, the step of analyzing the finite element model of the defined target object to obtain the performance parameter of the display screen assembly specifically includes:

Generating an analysis step corresponding to the test load based on the test load on the display screen assembly;

generating a deformation cloud picture, a stress cloud picture and a plastic deformation cloud picture of the display screen assembly based on the analysis step and the finite element model;

determining the maximum displacement and the residual displacement of the display screen based on the deformed cloud image;

and determining the maximum plastic strain amount of the display screen assembly based on the stress cloud image and the plastic deformation cloud image.

According to another aspect of the embodiment of the present invention, there is provided a rigidity performance analysis apparatus of a vehicle-mounted display screen, including: the system comprises a modeling module, a model analysis module and a judging module.

The modeling module is used for establishing a finite element model of a target object, and the target object comprises a display screen assembly; the model analysis module is used for analyzing the finite element model of the target object to obtain the performance parameters of the display screen assembly, wherein the performance parameters of the display screen assembly comprise at least one of the maximum displacement, the residual displacement and the maximum plastic strain of the display screen assembly; and the judging module is used for determining an analysis result of the display screen assembly according to the performance parameters of the display screen assembly.

In an optional manner, the model analysis module is specifically configured to obtain a constraint condition of a finite element model of the target object, and a load condition of the display screen assembly; and analyzing the finite element model of the target object according to the constraint condition of the finite element model of the target object and the load condition of the display screen assembly to obtain the performance parameters of the display screen assembly.

In an alternative way, the constraint includes: a first constraint and a second constraint; the first constraint includes: the degree of freedom of the joint of the two parts in the target object; the second constraint includes: and the deformation degree of freedom of the display screen assembly.

In an alternative form, the finite element model of the target object comprises grid nodes; the model analysis module is used for defining the degree of freedom of the connection position between the finite element models of the two parts in the finite element model of the target object according to the first constraint condition; according to the second constraint condition, defining the degree of freedom of grid nodes of a display screen assembly included in the finite element model of the target object; defining a test load of a display screen assembly in a finite element model of the target object according to the load condition; and analyzing the finite element model of the defined target object to obtain the performance parameters of the display screen assembly.

In an alternative manner, the modeling module is specifically configured to obtain physical parameters of the three-dimensional model of the target object; performing grid division on the three-dimensional model of the target object; and giving the physical parameters to the three-dimensional model of the target object to obtain the finite element model of the target object.

In an alternative mode, the display assembly comprises a display body, a display backboard and a display base; the modeling module is specifically used for uniformly dividing a three-dimensional model of the vehicle instrument panel assembly by adopting a neutral plane grid; dividing a three-dimensional model of the display screen body, a three-dimensional model of the display screen backboard and a three-dimensional model of the display screen bottom plate by adopting neutral plane grids, and dividing a three-dimensional model of the display screen base by adopting tetrahedral grids; and uniformly and excessively adopting local refined grids at a first position of the three-dimensional model of the display screen assembly, wherein the first position is a position used for connection on the three-dimensional model of the display screen assembly.

In an optional manner, the model analysis module is further configured to generate an analysis step corresponding to the test load based on the test load on the display screen assembly; generating a deformation cloud picture, a stress cloud picture and a plastic deformation cloud picture of the display screen assembly based on the analysis step and the finite element model; determining the maximum displacement and the residual displacement of the display screen based on the deformed cloud image; and determining the maximum plastic strain amount of the display screen assembly based on the stress cloud image and the plastic deformation cloud image.

According to another aspect of the embodiment of the present invention, there is provided a rigidity performance analysis apparatus of an in-vehicle display screen, including: processor, communication interface, memory, and communication bus.

Wherein: the processor, communication interface, and memory communicate with each other via a communication bus. A communication interface for communicating with network elements of other devices, such as clients or other servers, etc. And the processor is used for executing a program, and can specifically execute relevant steps in the embodiment of the control method for the energy recovery intensity.

In particular, the program may include program code comprising computer-executable instructions.

The processor may be a central processing unit, CPU, or an application specific integrated circuit, ASIC, or one or more integrated circuits configured to implement embodiments of the present invention. The control device of the energy recovery intensity comprises one or more processors, which may be of the same type of processor, such as one or more CPUs; but may also be different types of processors such as one or more CPUs and one or more ASICs.

And the memory is used for storing programs. The memory may comprise high speed RAM memory or may also comprise non-volatile memory, such as at least one disk memory.

The program may be specifically invoked by the processor to cause the control device of the energy recovery intensity to:

performing grid division on the three-dimensional model of the target object;

According to yet another aspect of an embodiment of the present invention, there is provided a computer-readable storage medium having stored therein at least one executable instruction for causing a stiffness property analysis apparatus/device of an in-vehicle display screen to:

performing grid division on the three-dimensional model of the target object;

evenly dividing the vehicle instrument board assembly by adopting a neutral plane grid;

According to the embodiment of the invention, the finite element model of the target object is established, then the finite element model of the target object is analyzed to obtain the performance parameters of the display screen assembly, and finally the analysis result of the display screen assembly is determined. The display screen assembly design method can verify whether the rigidity performance of the display screen assembly meets requirements or not in a design stage of the display screen assembly, avoids the waste of research and development time and cost caused by the fact that a plurality of samples are required to be produced in a traditional mode, improves the research and development efficiency of the display screen assembly, and reduces the research and development cost.

The foregoing description is only an overview of the technical solutions of the embodiments of the present invention, and may be implemented according to the content of the specification, so that the technical means of the embodiments of the present invention can be more clearly understood, and the following specific embodiments of the present invention are given for clarity and understanding.

Drawings

The drawings are only for purposes of illustrating embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:

FIG. 1 shows a flowchart of an embodiment of a method for analyzing stiffness performance of a vehicle-mounted display screen according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first embodiment of a vehicle dashboard assembly and display screen assembly provided by the present invention;

FIG. 3 is a schematic diagram of a display assembly according to the present invention;

FIG. 4 is a schematic view of a second embodiment of a vehicle dashboard assembly and display screen assembly provided by the present invention;

FIG. 5 is a schematic view of a third embodiment of a vehicle dashboard assembly and display screen assembly provided by the present invention;

FIG. 6 shows a first schematic diagram of a mesh structure of a finite element model of a target object provided by the present invention;

FIG. 7 shows a second schematic diagram of a mesh structure of a finite element model of a target object provided by the present invention;

fig. 8 is a schematic structural diagram showing an embodiment of a rigidity performance analysis device of a vehicle-mounted display screen provided by the invention;

fig. 9 shows a schematic structural diagram of an embodiment of a stiffness performance analysis device of an in-vehicle display screen.

Detailed Description

Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein.

In the traditional automobile industry, especially in the field of oil truck research and development, because the control system and the function of an oil truck are relatively simple, the display screen on the instrument panel of the oil truck is relatively simple, the model is relatively universal, the display screen of one model is generally used on various vehicle types, the production amount is large, the generation mode is mature, under the condition, the display screen of the oil truck is single in form, even if the display screen of a new model is designed, the display screen of the traditional oil truck is single in function, in the display screen design, the display screen is generally only improved on the basis of the original design, and the probability of directly passing the design verification is relatively high, so the display screen design of the traditional oil truck generally directly utilizes a die to produce a sample, and then the rigidity performance of the sample is checked.

However, with development of new energy automobiles, especially, development of automatic driving technology, current automobile control systems are relatively complex, and provide more functions, in this scenario, an instrument panel display screen is required to provide more functions, so that the display screen is required to be larger in size, at this moment, the display screen is difficult to design, and generally needs to pass through multiple rounds of verification, so that the display screen meeting the design requirement can be obtained.

Fig. 1 shows a flowchart of an embodiment of a method for analyzing rigidity performance of a vehicle-mounted display screen according to an embodiment of the present invention, which is performed by a rigidity performance analysis device of the vehicle-mounted display screen. As shown in FIG. 1, the method for analyzing the rigidity performance of the vehicle-mounted display screen comprises the following steps:

step 110: and establishing a finite element model of a target object, wherein the target object comprises a display screen assembly.

Illustratively, as shown in fig. 2, the target object further includes a vehicle dashboard assembly 1, and the display screen assembly 2 is mounted on the vehicle dashboard assembly 1, as shown in fig. 3. The display assembly 2 comprises a display body 21, a display backboard 22, a display baseboard 23 and a display base 24.

Specifically, when the finite element model of the target object is built, as shown in fig. 4 and fig. 5, a three-dimensional model of the target object and a unit type of each part in the target object are acquired first. And acquiring physical parameters of each part in the target object. The three-dimensional model of the target object includes a three-dimensional model of each part in the target object. Then, according to the unit type of each part, as shown in fig. 6 and 7, the three-dimensional model of each part is subjected to grid division to obtain a grid-divided model of each part; and giving the physical parameters of each part to the grid-divided model of each part to obtain the finite element model of each part. The finite element model of each part comprises: physical parameters of each component. The finite element model of each part may include a plurality of mesh nodes. The finite element model of the target object may include a finite element model of all components in the target object. All parts in the target object may include: components in the display assembly 2, and components in the vehicle dashboard assembly 1.

In the embodiment of the invention, the rigidity performance of the display screen assembly needs to be analyzed, and in one embodiment, only the display screen assembly can be subjected to grid division, so that the complexity of the rigidity performance analysis method of the vehicle-mounted display screen can be reduced. In another embodiment, the total layer of the vehicle dashboard may be meshed, in which, although the rigidity performance of the vehicle dashboard assembly does not need to be analyzed, the vehicle dashboard assembly is used as a supporting structure of the display screen assembly, and after the vehicle dashboard is meshed, the analysis result of the rigidity performance of the display screen assembly may be obtained more accurately, where the whole vehicle dashboard may be meshed, or only the structure directly contacting with the display screen assembly may be meshed according to the structure of the vehicle dashboard.

When the vehicle instrument board assembly is aimed at, the vehicle instrument board assembly belongs to a structure with small influence on analysis results, and neutral plane grids can be directly and uniformly divided, so that the implementation difficulty of the rigidity performance analysis method of the vehicle-mounted display screen can be reduced while the rigidity performance analysis precision of the display screen assembly is improved.

When the display screen assembly is divided into grids, the display screen body, the display screen backboard and the display screen bottom plate which are relatively regular in shape are divided in a neutral plane grid mode, the display screen base which is relatively irregular in shape is divided in a tetrahedral grid mode, and the grid division mode can effectively aim at specific structural characteristics of the display screen assembly and adopt the most suitable grid division mode, so that the rigidity performance analysis result of the display screen assembly is more accurate.

It should be noted that, since the display screen assembly is formed by a plurality of independent structures, after the three-dimensional model of the display screen body, the three-dimensional model of the display screen back plate, the three-dimensional model of the display screen bottom plate and the three-dimensional model of the display screen base are meshed, the detailed part of the three-dimensional model of the display screen assembly can be meshed more finely, and the first position of the three-dimensional model of the display screen assembly adopts a locally thinned grid uniformly and excessively, wherein the first position is a position for connection on the three-dimensional model of the display screen assembly, and it should be noted that the first position includes a connection position between different structures on the three-dimensional model of the display screen assembly, and a position where the three-dimensional model of the display screen assembly and the three-dimensional model of the instrument panel assembly are connected, where the connection position includes a position where two structures are in contact with each other, and also includes a position where the two structures are fixed with each other through a connection structure, for example, a position of a contact corner, and a screw hole position for fastening connection.

In some embodiments, the physical parameters of the three-dimensional model of the target object may include: size information and/or material parameters. Wherein the mechanical property parameter of each part depends on the property of the material adopted by the part. The mechanical performance parameters of the two parts with the same material properties are the same.

Wherein the types of physical parameters of the parts of different unit types in the three-dimensional model of the target object are different. For example, physical parameters of a component whose cell type is a solid cell may include material parameters and/or dimensional information (e.g., length, width, and height). For another example, the physical parameters of the component part of the unit type housing unit may include size information and material parameters, and the size information of the component part of the unit type housing unit may be thickness. The thickness of a component of a unit type housing unit may refer to the height of the component.

In some embodiments, the three-dimensional model of the target object may include three-dimensional data of the target object, such as the dimensions of various parts in the target object. The three-dimensional model of the target object may also characterize the shape of each part in the target object, as well as the connection between two parts in the target object.

Step 120: and obtaining constraint conditions of the finite element model of the target object and load conditions of the display screen assembly.

The load condition of the display screen assembly 2 is that a plurality of loads perpendicular to the display screen assembly 2 are applied to the front face and the back face of the display screen assembly, wherein the front face refers to one side for displaying content, and the back face is the opposite face to the side for displaying the content.

As shown in fig. 6, in some embodiments, the load applied to the front face of the display screen assembly 21 may be forces F1, F2, and F3 uniformly distributed on the upper edge of the front face; as shown in fig. 7, the load applied to the back surface of the display screen assembly 2 may be forces F4, F5 and F6 uniformly distributed on the upper edge of the back surface, and it should be noted that, in the practical application process, multiple forces may be used alone or in combination to verify the rigidity performance of the display screen assembly under various test loads.

It should be noted that, the test load can be set according to the actual design requirement, the position where the test load is applied, and specific numbers can be adaptively adjusted according to the design requirement, and particularly, according to different design structures, the position where the test load is applied needs to be adaptively adjusted according to the actual use scene of the vehicle-mounted display screen.

In some embodiments, constraints of the finite element model of the target object may include: a first constraint and a second constraint. The first constraint includes: the degree of freedom at the junction of two parts in the target object. The second constraint may include: and the deformation freedom degree of the first part.

Specifically, the connection relationship of the parts in the target object, and the first constraint condition may include: the vehicle instrument board assembly 1 is connected with the vehicle body through bolts, the degree of freedom is restrained by 1-6, the vehicle instrument board assembly 1 is connected with the vehicle body through clamping, the degree of freedom is restrained by 4-6, the steering support of the vehicle instrument board assembly 1 is connected with the vehicle body through welding, and the degree of freedom is restrained by 1-6. The display screen assembly 2 is connected with the vehicle instrument board assembly 1 through screws, and the degrees of freedom are restrained by 1-6. Wherein, the display screen body 21 and the display screen backboard 22 are fixedly connected through gluing, and the degree of freedom is restrained by 1-6; the display screen backboard 22 is fixedly connected with the display screen baseplate 23 through welding, and the degree of freedom is restrained by 1-6; the display screen bottom plate 23 is fixedly connected with the display screen base 24 by bolts, and the degree of freedom is restrained by 1-6; the display screen bottom plate 23 is connected with the display screen base 24 through a clamping connection, and the degree of freedom is restrained by 3-6 degrees; the display base 24 is fixed to the steering support of the vehicle dashboard assembly 1, restraining 1-6 degrees of freedom.

The deformation degrees of freedom of the display assembly 2 may include: the degrees of freedom in which all mesh nodes (such as those on the frame shown in fig. 6 or fig. 7) in the finite element model of the display body 21, the display back plate 22, and the display back plate 23 are deformed.

Step 130: and analyzing the finite element model of the target object according to the constraint condition of the finite element model of the target object and the load condition of the display screen assembly to obtain the performance parameters of the display screen assembly.

Wherein the performance parameter of the display screen assembly includes at least one of a maximum displacement amount, a residual displacement amount, and a maximum plastic strain amount of the display screen assembly.

Specifically, a first constraint condition in the constraint conditions defines the degree of freedom of a joint between the finite element models of two parts in the finite element model of the target object; then, according to the second constraint condition, defining the degree of freedom of grid nodes of the display screen assembly 2 included in the finite element model of the target object; then, defining a test load of the display screen assembly 2 in the finite element model of the target object according to the load condition; for example, the forces F1, F2, and F3 disclosed in the above embodiments are applied to the front surface of the display screen assembly 2; alternatively, forces F4, F5 and F6 are applied to the back of the display assembly 2. And finally, solving the finite element model of the defined target object to obtain the performance parameters of the display screen assembly 2.

In some embodiments, the process of solving the finite element model of the defined target object to obtain the performance parameter of the display screen assembly 2 specifically includes: generating an analysis step corresponding to the test load based on the test load on the display screen assembly; generating a deformation cloud image, a stress cloud image and a plastic deformation cloud image of the display screen assembly 2 based on the analysis step and the finite element model; wherein each analysis step may be analyzed separately, or a plurality of analysis steps may be analyzed simultaneously.

In the process of obtaining the deformation cloud image, the stress cloud image and the plastic deformation cloud image of the display screen assembly 2, determining the maximum displacement and the residual displacement of the display screen assembly 2 according to the deformation cloud image, in the practical application process, obtaining the deformation animation of the display screen assembly 2 based on the analysis step, and determining the maximum displacement and the residual displacement with the aid of the deformation animation, and in addition, determining the maximum plastic strain of the display screen assembly 2 according to the stress cloud image and the plastic deformation cloud image.

It should be noted that, the maximum displacement may include the overall maximum displacement of the display assembly 2, or may include the maximum displacement of each part on the display assembly, for example, the maximum displacement of the display body 21, the maximum displacement of the display back plate 22, or the maximum displacement of the display bottom plate 23 are given respectively; the residual displacement may include the overall residual displacement of the display assembly 2, or may include the residual displacement of each part on the display assembly, for example, the residual displacement of the display body 21, the residual displacement of the display back plate 22, or the residual displacement of the display back plate 23; the maximum plastic strain amount may include the overall maximum plastic strain amount of the display assembly 2, or may include the maximum plastic strain amounts of the parts on the display assembly, for example, the maximum plastic strain amount of the display body 21, the maximum plastic strain amount of the display back plate 22, or the maximum plastic strain amount of the display back plate 23, respectively.

Step 140: and determining an analysis result of the display screen assembly according to the performance parameters of the display screen assembly.

Wherein the design requirements may include: the maximum displacement of the display assembly 2 is less than the first threshold. If the maximum displacement of the display assembly 2 obtained in step 130 is less than the first threshold, it is determined that the display assembly 2 meets the design requirement, that is, the maximum displacement of the display assembly 2 is within a suitable range. If the maximum displacement of the display screen assembly 2 is greater than or equal to the first threshold value, it is determined that the display screen assembly 2 does not meet the design requirement, that is, the maximum displacement of the display screen assembly 2 is in an appropriate range.

In some embodiments, the design requirements may further include: the residual displacement of the display assembly 2 is less than the second threshold. If the residual displacement of the display assembly 2 obtained in step 130 is less than the second threshold, it is determined that the display assembly 2 meets the design requirement, that is, the residual displacement of the display assembly 2 is within a suitable range. If the residual displacement of the display screen assembly 2 is greater than or equal to the second threshold value, determining that the display screen assembly does not meet the design requirement, namely that the residual displacement of the display screen assembly 2 is in an appropriate range.

In some embodiments, the design requirements may further include: the maximum amount of plastic strain of the display screen assembly 2 is less than the third threshold. If the maximum plastic strain amount of the display screen assembly 2 obtained in step 130 is less than the third threshold, it is determined that the display screen assembly 2 meets the design requirement, that is, the maximum plastic strain amount of the display screen assembly 2 is within a suitable range. If the maximum plastic strain amount of the display screen assembly 2 is greater than or equal to the third threshold, the component can be irreversibly deformed (i.e., cannot be restored to the original shape), and the display screen assembly 2 is determined to be not in accordance with the design requirement, i.e., the maximum plastic strain amount of the display screen assembly 2 is in an appropriate range.

In the embodiment of the present invention, after determining that the display screen assembly 2 does not meet the design requirement, the design parameters of the display screen assembly 2 may be adjusted (for example, the size, structure or material of the display screen assembly 2 is modified) according to the performance parameters of the display screen assembly 2, so that the display screen assembly 2 meets the design requirement.

After adjusting the design parameters of the display screen assembly 2, the steps 110 to 140 may be re-executed for the adjusted display screen assembly 2 to determine the analysis result of the adjusted display screen assembly 2.

In some embodiments, the stiffness performance analysis device of the vehicle-mounted display screen may adopt a computer aided engineering (Computer Aided Engineering, CAE) technology to implement a stiffness performance analysis method of the vehicle-mounted display screen. Specifically, the stiffness property analysis device of the in-vehicle display screen may be provided with finite element analysis preprocessing software (e.g., hypermesh ^TM Software), finite element analysis software (e.g., ABAQUS ^TM Software, ansys ^TM Software or MSC ^TM Software), and finite element pre-and post-processing software (e.g., hyperView) ^TM Software), the rigidity performance analysis device of the vehicle-mounted display screen executes the rigidity performance analysis method of the vehicle-mounted display screen through the finite element analysis preprocessing software, the finite element analysis software and the finite element preprocessing software.

The method for analyzing the rigidity performance of the vehicle-mounted display screen provided by the embodiment of the invention comprises the following steps: establishing a finite element model of the target object; analyzing the finite element model of the target object to obtain the performance parameters of the display screen assembly 2; and determining an analysis result of the display screen assembly 2 according to the performance parameters of the display screen assembly 2. By applying the technical scheme of the embodiment of the application, the analysis result of the rigidity performance of the display screen assembly 2 can be verified in the design stage of the display screen assembly 2, the waste of research and development time and cost caused by the need of producing a plurality of samples in a traditional mode is avoided, the research and development efficiency of the display screen assembly 2 is improved, and the research and development cost is reduced.

Fig. 8 shows a schematic structural diagram of an embodiment of a rigidity performance analysis device of a vehicle-mounted display screen according to an embodiment of the present invention. As shown in fig. 8, the stiffness property analysis device 800 of the in-vehicle display screen includes: a modeling module 810, a model analysis module 820, and a determination module 830.

Wherein the modeling module 810 is configured to build a finite element model of a target object, the target object comprising a display screen assembly; the model analysis module 820 is configured to analyze the finite element model of the target object to obtain a performance parameter of the display screen assembly, where the performance parameter of the display screen assembly includes at least one of a maximum displacement amount, a residual displacement amount, and a maximum plastic strain amount of the display screen assembly; the judging module 830 is configured to determine an analysis result of the display screen assembly according to the performance parameter of the display screen assembly.

In an alternative manner, the model analysis module 820 is specifically configured to obtain constraint conditions of the finite element model of the target object, and load conditions of the display screen assembly; and analyzing the finite element model of the target object according to the constraint condition of the finite element model of the target object and the load condition of the display screen assembly to obtain the performance parameters of the display screen assembly.

In an alternative form, the finite element model of the target object comprises grid nodes; the model analysis module 802 is configured to define degrees of freedom at a connection point between the finite element models of two parts in the finite element model of the target object according to the first constraint condition; according to the second constraint condition, defining the degree of freedom of grid nodes of a display screen assembly included in the finite element model of the target object; defining a test load of a display screen assembly in a finite element model of the target object according to the load condition; and analyzing the finite element model of the defined target object to obtain the performance parameters of the display screen assembly.

In an alternative manner, the modeling module 810 is specifically configured to obtain physical parameters of the three-dimensional model of the target object; performing grid division on the three-dimensional model of the target object; and giving the physical parameters to the three-dimensional model of the target object to obtain the finite element model of the target object.

In an alternative mode, the display assembly comprises a display body, a display backboard and a display base; the modeling module 810 is specifically configured to uniformly divide a three-dimensional model of the vehicle dashboard assembly by using a neutral plane grid; dividing a three-dimensional model of the display screen body, a three-dimensional model of the display screen backboard and a three-dimensional model of the display screen bottom board by adopting neutral plane grids, and dividing the display screen base by adopting tetrahedral grids; and uniformly and excessively adopting local refined grids at a first position of the three-dimensional model of the display screen assembly, wherein the first position is a position used for connection on the three-dimensional model of the display screen assembly.

In an alternative manner, the model analysis module 820 is further configured to generate an analysis step corresponding to the test load based on the test load on the display screen assembly; generating a deformation cloud picture, a stress cloud picture and a plastic deformation cloud picture of the display screen assembly based on the analysis step and the finite element model; determining the maximum displacement and the residual displacement of the display screen based on the deformed cloud image; and determining the maximum plastic strain amount of the display screen assembly based on the stress cloud image and the plastic deformation cloud image.

The rigidity performance analysis device of the vehicle-mounted display screen provided by the embodiment of the invention utilizes a modeling module 810 to establish a finite element model of a target object; and then, analyzing the finite element model of the target object by a model analysis module 820 to obtain the performance parameters of the display screen assembly 2, and finally, determining the analysis result of the display screen assembly by a judgment module 830. By applying the technical scheme of the embodiment of the application, the analysis result of the rigidity performance of the display screen assembly 2 can be verified in the design stage of the display screen assembly 2, the waste of research and development time and cost caused by the need of producing a plurality of samples in a traditional mode is avoided, the research and development efficiency of the display screen assembly 2 is improved, and the research and development cost is reduced.

Fig. 9 is a schematic structural diagram of an embodiment of a stiffness performance analysis device for a vehicle-mounted display screen according to an embodiment of the present invention, and the specific embodiment of the present invention is not limited to a specific implementation of the stiffness performance analysis device for a vehicle-mounted display screen.

As shown in fig. 9, the stiffness property analysis device of the in-vehicle display screen may include: a processor 902, a communication interface (Communications Interface), a memory 906, and a communication bus 908.

Wherein: processor 902, communication interface 904, and memory 906 communicate with each other via a communication bus 908. A communication interface 904 for communicating with network elements of other devices, such as clients or other servers. The processor 902 is configured to execute the program 910, and may specifically perform relevant steps in the above-described embodiment of the stiffness performance analysis method for an on-vehicle display screen.

In particular, the program 910 may include program code including computer-executable instructions.

The processor 902 may be a central processing unit, CPU, or a specific integrated circuit ASIC (Application Specific Integrated Circuit), or one or more integrated circuits configured to implement embodiments of the present invention. The one or more processors included in the stiffness performance analysis device of the vehicle-mounted display screen may be the same type of processor, such as one or more CPUs; but may also be different types of processors such as one or more CPUs and one or more ASICs.

A memory 906 for storing a program 910. Memory 906 may comprise high-speed RAM memory or may also include non-volatile memory (non-volatile memory), such as at least one disk memory.

Program 910 may be specifically invoked by processor 902 to cause an XXX device to:

and establishing a finite element model of a target object, wherein the target object comprises a display screen assembly.

And analyzing the finite element model of the target object to obtain the performance parameter of the display screen assembly, wherein the performance parameter of the display screen assembly comprises at least one of the maximum displacement, the residual displacement and the maximum plastic strain of the display screen assembly.

In an alternative way, the constraint includes: a first constraint and a second constraint.

The first constraint includes: and the degree of freedom of the joint of the two parts in the target object is the degree of freedom.

In an alternative form, the finite element model of the target object comprises grid nodes.

and defining the degree of freedom of the junction between the finite element models of the two parts in the finite element model of the target object according to the first constraint condition.

And defining the degree of freedom of grid nodes of a display screen assembly included in the finite element model of the target object according to the second constraint condition.

And defining the test load of the display screen assembly in the finite element model of the target object according to the load condition.

And acquiring physical parameters of the three-dimensional model of the target object.

And carrying out grid division on the three-dimensional model of the target object.

In an alternative form, the display assembly includes a display body, a display back plate, and a display base.

and uniformly dividing the three-dimensional model of the vehicle instrument panel assembly by adopting a neutral plane grid.

Dividing the three-dimensional model of the display screen body, the three-dimensional model of the display screen backboard and the three-dimensional model of the display screen bottom plate by adopting neutral plane grids, and dividing the three-dimensional model of the display screen base by adopting tetrahedral grids.

And generating an analysis step corresponding to the test load based on the test load on the display screen assembly.

And generating a deformation cloud picture, a stress cloud picture and a plastic deformation cloud picture of the display screen assembly based on the analysis step and the finite element model.

And determining the maximum displacement and the residual displacement of the display screen based on the deformed cloud image.

The memory 906 of the stiffness performance analysis device of the vehicle-mounted display screen provided by the embodiment of the invention is used for storing the program 910, and the program 910 can be specifically called by the processor 902 to realize: firstly, establishing a finite element model of a target object, then analyzing the finite element model of the target object to obtain performance parameters of the display screen assembly 2, and finally, determining an analysis result of the display screen assembly. By applying the technical scheme of the embodiment of the application, the analysis result of the rigidity performance of the display screen assembly 2 can be verified in the design stage of the display screen assembly 2, the waste of research and development time and cost caused by the need of producing a plurality of samples in a traditional mode is avoided, the research and development efficiency of the display screen assembly 2 is improved, and the research and development cost is reduced.

The embodiment of the invention provides a computer readable storage medium, which stores at least one executable instruction, and when the executable instruction runs on stiffness performance analysis equipment/device of a vehicle-mounted display screen, the stiffness performance analysis equipment/device of the vehicle-mounted display screen executes the stiffness performance analysis method of the vehicle-mounted display screen in any method embodiment.

The executable instructions may be specifically for causing a stiffness property analysis device/apparatus of an in-vehicle display screen to:

When executable instructions stored in the computer readable storage medium are executed, firstly, a finite element model of a target object is established, then the finite element model of the target object is analyzed to obtain performance parameters of the display screen assembly 2, and finally, an analysis result of the display screen assembly is determined. By applying the technical scheme of the embodiment of the application, the analysis result of the rigidity performance of the display screen assembly 2 can be verified in the design stage of the display screen assembly 2, the waste of research and development time and cost caused by the need of producing a plurality of samples in a traditional mode is avoided, the research and development efficiency of the display screen assembly 2 is improved, and the research and development cost is reduced.

The algorithms or displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. In addition, embodiments of the present invention are not directed to any particular programming language.

In the description provided herein, numerous specific details are set forth. It will be appreciated, however, that embodiments of the invention may be practiced without such specific details. Similarly, in the above description of exemplary embodiments of the invention, various features of embodiments of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. Wherein the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.

Those skilled in the art will appreciate that the modules in the apparatus of the embodiments may be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components of the embodiments may be combined into one module or unit or component and, furthermore, they may be divided into a plurality of sub-modules or sub-units or sub-components. Except that at least some of such features and/or processes or elements are mutually exclusive.

It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names. The steps in the above embodiments should not be construed as limiting the order of execution unless specifically stated.

Claims

1. The rigidity performance analysis method of the vehicle-mounted display screen is characterized by comprising the following steps of:

2. The method for analyzing the rigidity performance of the vehicle-mounted display screen according to claim 1, wherein analyzing the finite element model according to the target object to obtain the performance parameters of the display screen assembly comprises:

3. The method for analyzing rigidity performance of an in-vehicle display screen according to claim 2, wherein the constraint condition includes: a first constraint and a second constraint;

4. A method of analyzing stiffness properties of an on-board display screen according to claim 3, wherein the finite element model of the target object comprises grid nodes;

5. The method for analyzing rigidity performance of an in-vehicle display screen according to any one of claims 1 to 4, wherein the building of the finite element model of the target object includes:

performing grid division on the three-dimensional model of the target object;

6. The method for analyzing rigidity performance of an in-vehicle display screen according to claim 5, wherein the physical parameters include: size information and/or material parameters.

7. The method for analyzing rigidity performance of an in-vehicle display screen according to claim 5, wherein the target object further comprises a vehicle dashboard assembly;

the step of meshing the three-dimensional model of the target object includes:

8. The method for analyzing rigidity performance of vehicle-mounted display screen according to claim 5, wherein the display screen assembly comprises a display screen body, a display screen backboard, a display screen bottom board and a display screen base;

The step of meshing the three-dimensional model of the target object includes:

9. The method for analyzing rigidity performance of vehicle-mounted display screen according to claim 4, wherein the step of analyzing the finite element model of the defined target object to obtain the performance parameter of the display screen assembly specifically comprises the following steps:

10. The rigidity performance analysis device of the vehicle-mounted display screen is characterized by comprising:

the modeling module is used for building a finite element model of a target object, wherein the target object comprises a display screen assembly;

the model analysis module is used for analyzing the finite element model of the target object to obtain the performance parameters of the display screen assembly, wherein the performance parameters of the display screen assembly comprise at least one of the maximum displacement, the residual displacement and the maximum plastic strain of the display screen assembly;

and the judging module is used for determining an analysis result of the display screen assembly according to the performance parameters of the display screen assembly.